My current list of Technologies.
MOBILE – iPHONE ANDROID
I develop iPHONE, ANDROID and RESPONSIVE WEB. My tool set is Swift for iPHONE, KOTLIN for ANDROID, FLUTTER to do native Apps on Both platforms, or Angular / Polymer for responsive web. goLang server side for API. For backend, API and Authentication I usually use FIREBASE.
I can also build the RESTful API middleware to your onPREM or inCLOUD systems that not only add redundancy, increase performance but also add a security layer. Usually GoLang
CLOUD – SOFTWARE DEVELOPMENT – GoLang and Node.js
I primarily use Google App Engine and Digital Ocean for projects. Development I use GoLang and Node.js. RESTful API in GoLang using gRPC and I also use FireBase for most projects, which includes realtime DB that works with iPHONE, ANDROID and Polymer ( my web solution), Cloud Functions in ( node.js ), A really nice Authentication system and Mobile Messaging ( to name a few). Digital Ocean, has really cheap Docker containers, where I host GoLang services. There are a lot of other SSD hosts out there as well..
Internet of Things – IoT . Embedded Devices
Custom development of Embedded devices. Two Types of devices. Either an Embeded Dydtem on Chip with little or No OS, where we design the Firmware as well hardware. Above that, we offer more sophisticated devices running Linux or RTOS. All devices communicate via some sort of Wireless Network, BLE, NFC, WIFI, CELULAR, LoRa. Devices are remotely Administrated and Monitored. firmware is either C/C++, GoLang on the devices… communicate via an MQTT Protocol. Often using simple ANDROID devices as a remote controller. hardware revolves around: ESP32, ARM, Ti430, Rassberry Pi.
Mostly involved in doing SmartContracts in Ehtereum using Solidity. But also SmartContracts on HyperLedger and Quorum, Which is a JPMoran Bank Initiative. Although Solidity is the primary Language for Smart Contracts, I also work extensively with other relevant languages primarily GoLang and Node.js for Server side, and Swift, Kotlin, Polymer, JS on Client user side.
My previous Life was in Industrial Automation. PLC (Programmable Logic Controllers), SCADA, MMI, API/RESTful INTERFACES to machine controls. Industrial Networks like Foundation Fieldbase. ModBus, ProfiBus, 1Wire, CAN… Includes intelligent hardware Gateway to Industrial networks, Interfaces to smart devices. Really anything related to Embedded controls that interface with Industrial. Also… industrial internet Security systems.